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+// This is an example configuration file for DHCPv6 server in Kea.
+// It provides parameters controlling processing of expired leases,
+// a.k.a. leases reclamation.
+
+{ "Dhcp6":
+
+{
+// Kea is told to listen on eth0 interface only.
+  "interfaces-config": {
+    "interfaces": [ "eth0" ]
+  },
+
+// We need to specify the database used to store leases. As of
+// June 2022, three database backends are supported: MySQL,
+// PostgreSQL and the in-memory database, Memfile.
+// We'll use memfile  because it doesn't require any prior set up.
+// Note, we're setting the maximum number of row read errors to 100,
+// (defaults to 0, meaning unlimited).
+  "lease-database": {
+      "type": "memfile",
+      "lfc-interval": 3600,
+      "max-row-errors": 100
+  },
+
+// The following parameters control processing expired leases. Expired leases
+// will be reclaimed periodically according to the "reclaim-timer-wait-time"
+// parameter. Reclaimed leases will be held in the database for 1800s to
+// facilitate lease affinity. After this period the leases will be removed.
+// The frequency of removal is controlled by the
+// "flush-reclaimed-timer-wait-time" parameter. The lease reclamation
+// routine will process at most 500 leases or will last for at most
+// 100ms, during a single run. If there are still some unreclaimed
+// leases after 10 attempts, a warning message is issued.
+  "expired-leases-processing": {
+    "reclaim-timer-wait-time": 5,
+    "hold-reclaimed-time": 1800,
+    "flush-reclaimed-timer-wait-time": 10,
+    "max-reclaim-leases": 500,
+    "max-reclaim-time": 100,
+    "unwarned-reclaim-cycles": 10
+  },
+
+// Addresses will be assigned with preferred and valid lifetimes
+// being 3000 and 4000, respectively. Client is told to start
+// renewing after 1000 seconds. If the server does not respond
+// after 2000 seconds since the lease was granted, client is supposed
+// to start REBIND procedure (emergency renewal that allows switching
+// to a different server).
+  "preferred-lifetime": 3000,
+  "valid-lifetime": 4000,
+  "renew-timer": 1000,
+  "rebind-timer": 2000,
+
+// The following list defines subnets. Each subnet consists of at
+// least subnet and pool entries.
+  "subnet6": [
+    {
+      "pools": [ { "pool": "2001:db8:1::/80" } ],
+      "subnet": "2001:db8:1::/64",
+      "interface": "eth0"
+    }
+  ],
+
+// The following configures logging. It assumes that messages with at
+// least informational level (info, warn, error and fatal) should be
+// logged to stdout.
+    "loggers": [
+        {
+            "name": "kea-dhcp6",
+            "output_options": [
+                {
+                    "output": "stdout"
+                }
+            ],
+            "debuglevel": 0,
+            "severity": "INFO"
+        }
+    ]
+}
+
+}